Coherent controlling surface plasmon transport properties in Ag nanowire by classic optical field

Abstract

Coherent controlling surface plasmon transport in metal nanowire coupled to quantum dot is investigated theoretically by real-space method. In the calculations, the dispersion relation of metal nanowire is supposed to be linear and the quantum dot is a cascaded three-level system. The calculations reveal that whether the surface plasmon is transmitted or reflected by turning off or on the classic field can be controlled. The surface plasmon transmission and reflection spectra can be controlled by adjusting the intensity and the circular frequency of classic optical field even the energy of surface plasmon and quantum dot is not matched. The dissipations affecting on the transport properties are also discussed.